I also use spider plants and pothos.
Spider plants offer shade and pothos grow very, very fast.
But still, one must be prepared to replace a plant or two regularly.
Tortoises don't respect aesthetic landscaping.
One thing i used to do was dig misc “tufts” of grass (roots, stalks, blades) of misc grasses, weeds, etc and plant those in our Sullys enclosure. Easily replaced, good to munch. Others have mentioned the modt common. You can get pretty creative with various grasses and the other plants....and your tort will help prune.
A lot of plants are good in tortoises enclosures. if you don't want a tortoise to eat a certain plant, place it outside the enclosure but near the enclosure.